Tom and his family went to a restaurant for dinner the bill came to $80 they wanted to leave an %18 tip about how much tip should they leave? pls help

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).